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Post-Stroke Depression at Teaching Hospital Center of Libreville  [PDF]
I. A. Camara, C. M. Coulibaly, N. Diouf Mbourou, P. M. Gnigone, G. A. G. Mambila Matsalou, A. Nsounda Mandzela, L. Oura, J. Nyangui Mapaga, U. D. Kombila, M. M. Moubecka, P. N. Kouna
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1105049
Abstract:
Introduction: Post-stroke depression occurs in a context of stroke characterized by sadness, loss of interest, feelings of guilt, loss of appetite, a feeling of tiredness, and a lack of concentration. Material and Methods: We conducted a descriptive cross-sectional study from January 1, 2013 to September 30, 2016. For the diagnosis of post-stroke depression, neuropsychological tests (DSM-IV and MADRS) were used. The collection approach was a maintenance survey followed by an examination. Results: From 153 stroke patients, 48.4% (n = 74) had post-stroke depression. Depressed mood was noted in 50.3% and 43.8% had a marked decrease in interest. 67.9% of these patients had a primary level of education. Widows had 4.2 times the risk of post-stroke depression, and married and retired patients were 3 times more likely than public servants. The occurrence of post-stroke depression was significantly related to the presence of motor deficit in our patients, p < 0.0001. Conclusion: These results suggest that the risk of developing depression after stroke increases with the motor deficit. The DSM-IV and MADRS scores remain neuropsychological examinations of choice for the diagnostic approach.
Slow Spinal Cord Compression Inducing by Malignant Peripheral Nerve Sheath Tumors in Cotonou  [PDF]
D. Gnonlonfoun, C. Adjien, J. Nyangui Mapaga, L. Hode, G. Goudjinou, A. Sowanou, R. Domingo, P. Gnigone, G. Mambila, D. Affanou, P. H. Kouna Ndouongo, D. Houinato
Neuroscience & Medicine (NM) , 2018, DOI: 10.4236/nm.2018.91004
Abstract: MPNST is a very uncommon malignant type of neoplasm. It is often associated with neurofibromatosis type 1 (von Recklinghausen disease). It involves large anatomical regions, and thus takes on varied clinical presentations. However, bone location of MPNST, particularly in the spinal canal has been poorly described in the literature. We hereby report the case of a 29-year old young man with MPNST in the spinal canal. He presented a slow spinal cord compression confirmed by spinal MRI. MPNST was revealed through histologic and immune histochemical features after tumor resection.
Secondary Bithalamic Ischemic Vascular Accident Has an Occlusion of the Artery of Percheron  [PDF]
Jennifer Nyangui Mapaga, Ibrahima A?ssata Camara, Grass Aurelle Mambila Matsalou, Pupchen Marilyse Gnigone, Nelly Diouf Mbourou, Annick Nsounda Mandzela, Cherif Mohamadou Aidara, Kouna Ndouongo Philomène
Open Access Library Journal (OALib Journal) , 2019, DOI: 10.4236/oalib.1105169
Abstract:
The bithalamic ischemic stroke secondary to percheron artery occlusion occupies a small place in the large ischemic stroke family, but its clinical polymorphism arouses patrician curiosity. We thus report 3 observations that explain the richness of this affection.
Quality Issues in Higher Education: A Multicriteria Framework of Satisfaction Measures  [PDF]
G. A. Dimas, A Goula, G. Pierrakos
Creative Education (CE) , 2011, DOI: 10.4236/ce.2011.23042
Abstract: Higher education attributes significant interest to student satisfaction because of its potential impact on the quality dimensions of the offered services. This is illustrated from the large number of studies that have shown a moderate to strong relationship between these two concepts. This paper provides a detailed analysis of a student satisfaction survey conducted at the Health Care Management Department of the Technological Education Institute of Athens. The analysis was based on a multi-criteria preference disaggregation method (MUSA). Results are focused on the evaluation of student choices, while significant findings of the applied methodology constitute the determination of strong and weak points of the educational component’s preferences that form important suggestions for the improvement of the satisfaction level and the quality characteristics of the correspondent services.
Prevalence and Associated Factors of Cephales in a Professional Environment—Case of Teachers of Libreville  [PDF]
Ibrahima Aissata Camara, Maёl Ndao Eteno, Annick Nsounda Mandzela, Nelly Diouf Mbourou, Grass Aurelle Mambila Matsalou, Jennifer Nyangui Mapaga, Pupchen Marilyse Gnigone, Landry Oura, Mounguengui Martine Moubecka, Philomène Kouna
Open Access Library Journal (OALib Journal) , 2019, DOI: 10.4236/oalib.1105168
Abstract:
Objective: To determine the prevalence of headaches among Libreville teachers. Introduction: Headaches, commonly referred to as “headaches”, correspond to all the unpleasant sensations felt in the head. It is generally a question of subjective manifestations that only the patient can express. The most common functional sign is pain, which in itself is difficult to measure. Methodology: This is a cross-sectional prospective study with analytical and descriptive aims, which took place over a period of 4 months from February 1st to June 1st, 2016. It took place in five public secondary schools in two of the six districts of Libreville. Was considered cephalalgic (or suffering from headache), any teacher who answered “Yes” to the question: “Are you prone to headaches?” The choice of the reference interval to be able to evaluate the working time of the recruited teachers was inspired by the European standards which globally place the average weekly working time of teachers between 30 and 40 hours. The collected data were processed and analyzed with Epi-info 7 and SPSS 22 software. A regression analysis was performed to identify the associated factors. Results: We collected 236 teachers whose average age was 43.2 ± 7.9 years, with extremes of 27 and 60 years. There were 141 men (59.7%) and 95 women (40.3%) with a sex ratio of 0.96. The prevalence of headache was 76.7%. The factors associated with headaches were the subject taught, the number of students, and the provision of private tutoring. Five main triggers were found: overwork (86.2%), lack of sleep (84.5%), sun (73.5%), noise (68%) and fatigue (64.6%). The effects of headache were discomfort in daily activities (65.7%), absenteeism (35.9%) and a reduction in sleep time. Conclusion: Our study shows that headaches particularly affect the teaching profession with female predominance due to stressful situations caused by their work environment.
A Fourth Order Improved Numerical Scheme for the Generalized Burgers—Huxley Equation  [PDF]
A. G. Bratsos
American Journal of Computational Mathematics (AJCM) , 2011, DOI: 10.4236/ajcm.2011.13017
Abstract: A fourth order finite-difference scheme in a two-time level recurrence relation is proposed for the numerical solution of the generalized Burgers--Huxley equation. The resulting nonlinear system, which is analysed for stability, is solved using an improved predictor-corrector method. The efficiency of the proposed method is tested to the kink wave using both appropriate boundary values and conditions. The results arising from the experiments are compared with the relevant ones known in the available bibliography.
External Magnetic Field Effects on the Rayleigh-Taylor Instability in an Inhomogeneous Rotating Quantum Plasma  [PDF]
G. A. Hoshoudy
Journal of Modern Physics (JMP) , 2012, DOI: 10.4236/jmp.2012.311224
Abstract: The effects of external magnetic field effects on the Rayleigh-Taylor instability in an inhomogeneous stratified quantum plasma rotating uniformly are investigated. The external magnetic field is considered in both horizontal and vertical direction. The linear growth rate is derived for the case where a plasma with exponential density distribution is confined between two rigid planes at z=0 and z=h, by solving the linear QMHD equations into normal mode. Some special cases are particularized to explain the roles that play the variables of the problem. The results show that, the presence of both external horizontal and vertical magnetic field beside the quantum effect will bring about more stability on the growth rate of unstable configuration. The maximum stability will happen in the case of wave number parallels to or in the same direction of external horizontal magnetic field.
Equilibrium Dynamics in the Neoclassical Growth Model with Habit Formation and Elastic Labor Supply  [PDF]
Manuel A. Gómez
Theoretical Economics Letters (TEL) , 2012, DOI: 10.4236/tel.2012.25087
Abstract: This note analyzes the equilibrium dynamics in the neoclassical growth model with habit-forming preferences and elastic labor supply. Habits enter into utility in a multiplicative way. The specification of the habit formation process comprises the particular cases of internal and external habits. Existence, uniqueness and saddle-path stability of the steady state are proved analytically.
Rayleigh-Taylor Instability in Magnetized Plasma  [PDF]
G. A. Hoshoudy
World Journal of Mechanics (WJM) , 2014, DOI: 10.4236/wjm.2014.48027
Abstract:

The Rayleigh-Taylor instability in stratified plasma has been investigated in the presence of combined effect of horizontal and vertical magnetic field. The linear growth rate has been derived for the case where plasma with exponential density distribution is confined between two rigid planes by solving the linear MHD equations into normal mode. Some special cases have been particularized to explain the roles the variables of the problem play; numerical solutions have been made and some stability diagrams are plotted and discussed. The results show that, the growth rate depends on the horizontal and vertical components of magnetic field and also depends on the parameter λ*=λLD  (λ is constant and LD is the density-scale length). The maximum instability happens at λ*=-0.5 and to get more stability model we select λ* such that it is different than λ*=-0.5. The vertical magnetic field component have a greater effect than the horizontal magnetic field component in the case of large wavelength, while in the case of short wavelength, the horizontal magnetic field components have greater effect than the vertical magnetic field component.

System of Potential Barriers in Nanostructures  [PDF]
A. G. Gulyamov
World Journal of Condensed Matter Physics (WJCMP) , 2015, DOI: 10.4236/wjcmp.2015.52009
Abstract: Nanoscale superlattice has been investigated theoretically. It has been shown that the deformation effects on the energy spectrum of nanoscale superlattice by changing the interatomic distances as well as varying the width and height of the potential barrier. The potential deformation has been estimated. It has been shown that for different edges of forbidden bands the deformation potential has different values. It has been also analyzed the dependence of the effective mass on energy. It has been determined that the effective mass crosses periodically the zero mark. It has been concluded that this phenomena contributes to the periodic change of the oscillation frequency de Haas-van Alphen effect.
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